Because they are two colors, and strong enough, when acting together they can suppress any one of Kane's group with the tacit understanding and energy coordination between brothers.
Even if two individuals face off against them, the brothers, with their coordination, won't be defeated.
But obviously, this can't involve Kreya or Lilulu.
Kreya can directly drag one into the Nether River for a duel using black and white flames.
Lilulu can directly trap one within the maze, even if the person inside is powerful, they must break through the maze to get out.
At this time, the brother left outside would be assaulted by two people, making survival difficult.
Now they have become part of the god they worship, possessing supreme personality power, allowing them to be immune to Kreya's abilities.
Before being dragged into Kreya's Nether River, they broke the black and white flames surrounding them.
